iTelescope doesn't support sexagesimal coordinates. Here's what Aron emailed me:
"The standard version of ACP is designed to work with many catalogs so chooses the most standard format when using the ACP planner. It's been a while since I've used the planner, but I believe there is a way to set it up to use the decimal format as well."
I couldn't find where I could set it up to use the decimal format. It would be great to have that option. Thanks!