Ryan

I presume that you are putting in the correct time and date?

The 1 hour difference made by Daylight Savings/British Summer Time equates to 15 degrees on the sky (1/24 of 360 degrees).

As far as levelling the tube, etc, I have a non-PE scope but make sure that the tripod is LEVEL, and then, when aligning the scope that the OTA is also LEVEL (I use a spirit level for these). I don't then have a problem with either alignment or GoTo's

Others reckon that levelling by eye is good enough. I have always used a spirit level and never suffered from alignment errors.

I use EASY ALIGN and have no problems.

Just my two 'pennorth

Art