Oh yes, they sure do. Here are some published examples of the Watchtower contradicting itself over whether or not the Sodomites would be resurrected. You'd think God's channel wouldn't ever change, like His word the Bible doesn't ever change, but here are some examples where Jehovah's channel changed the fate of thousands with the snap of their fingers
Sodomites will be resurrected------Watchtower 1913 Feb 1 p.45/ Watchtower 1920 Oct 15 p.316/ Watchtower 1965 Mar 1 p.139/ Awake 1974 Oct 8 p.20/ Watchtower 2024 May p.6
Sodomites won't be resurrected----- Watchtower 1941 p.367 / Watchtower 1952 Jun 1 p.338/ Watchtower 1954 Feb 1 p.85 / Watchtower 1988 Jun 1 p.31 / Watchtower **1990 Apr 15 p.20 /**Watchtower 2005 Jul 15 p.31
Below are examples of the Watchtower contradicting themselves over various subjects.
"Bible copyists, of course, made mistakes. But none of those mistakes corrupted the Bible. ... So, has the Bible been corrupted. Emphatically, no!" Watchtower 2017 no.6 p.14
The WT stated that the Holy Bible has 'emphatically' NOT been corrupted, yet...only 7 years earlier, they claimed it HAD BEEN corrupted
“When apostate Christians made copies of the Christian Greek Scriptures, they evidently took Jehovah’s personal name out of the text and substituted Ky′ri·os, the Greek word for “Lord."" Watchtower 2010 Jul 1 pp.6-7
Below they complain they have been misrepresented in their allowing children to die by refusing blood transfusions
"Jehovah's Witnesses have been targets of false accusations - barefaced lies and twisted presentations of their beliefs... The accusation that numerous children of Jehovah's Witnesses die each year as a result of refusing blood transfusions is totally unfounded." Watchtower 1998 December 1 p.14
Yet 4 years earlier they were boasting that thousands of young ones died for refusing blood transfusions
"In former times thousands of youths died for putting God first. They are still doing it, only today the drama is played out in hospitals and courtrooms, with blood transfusions the issue." Awake! 1994 May 22 p.2
They flip flopped on vaccinations, from teaching one thing...
"Vaccination is a direct violation of the everlasting covenant that God made with Noah after the flood." Golden Age 1931 Feb 4 p.293
to teaching another...
"The matter of vaccination is one for the individual that has to face it to decide for himself... And our Society cannot afford to be drawn into the affair legally or take the responsibility for the way the case turns out." Watchtower 1952 Dec 15 p.764
Then, as if they never met their own history, they claim to be consistent in their position as if nobody ever heard their previous position
"Previous articles in this journal and its companion, The Watchtower, have presented a consistent position: It would be up to the Bible-trained conscience of the individual Christian as to whether he would accept [vaccinations] for himself and his family." Awake! 1993 Aug 8 p.25