That's normal for any Republican candidate in a federal election campaign. Not to be confused with the same Republicans once elected.
Ronald Reagan campaigned on an anti-abortion platform. Once elected, he turned his back on the anti-abortion crowd. Bush II - and most of his allies in Congress - promised to ban abortion. And yet when Republicans controlled the House, Senate AND White House - at the same time - for a couple years during his Presidency - and the Democrats could not have stopped them - they..... forgot. Slipped their minds completely.
Instead all they do is stop funding for international family planning programs, giving them the illusion of action while not affecting American voters. (Action which likely leads to an increase in abortions.)
The closest thing to a real exception is Bush II's change to the Nixon-era "Right of Conscience Law." But let's be honest here: This was done AFTER the election, two days before Obama took power as a dirty trick, a change Republicans would never make otherwise. In changing it back, Obama mirrored the policies of the last five Republican presidents while they were in office. (Including the first 2920 days of Bush II's 2922 days in office.)