I think they tried explaining the movie wrong

If you expect a ghost story beforewatching this you'll be disappointed.

Possible spoilers......

When I thought they were going to pull the old "it's the twin sister" stalking the new wife I was going to give a bad rating but since I had heard about the below time slip theory I actually liked the twist.

The way they kept bringing up time travel and the Phila Experiment only confused the people more. It was more about Time Shifts/time slips which are supposedly possible although this movie may have been an exageration of that theory.

According to a coast to coast show:

"Researcher & experiencer Starfire Tor talked about time shifts, and her unified theory of psi. The theory posits that all psi & paranormal phenomena come from the same source or field. This field also incorporates time shifts-- "an astounding phenomenon in which our perceived reality and the timelines are just constantly being restructured," she said. Alternate versions of the timeline can coexist in different frequencies, and time slips occur when people become aware of odd changes... Whitley & Anne Strieber joined Starfire for a segment to discuss an unusual time slip episode they had when first meeting her."

If you search youtube and type in Coast to Coast am Time Shifts /time slips you'll find some videos of the show.

http://www.youtube.com/watch?v=aQNcl4Cn4Ys

Another problem is Where or When by Johnny Mathis would have been a better version of the song played at the ending credits than the one they played.
I guess they wouldn't give them permission to use it.