you have too low signal to get good speed.
You can send the support output files from both routers to email@example.com
to check maybe there are some problems with the configuration.
Well, actually this is not completely true.. with a signal of -80 you should be able to get even 15 mbps hdx (which is not that bad).
Surely -80 is NOT that good (at least not with a 27dbi dish and an sr5)
Are you sure you do have clear line of site between the two points?
What's the distance?
If you get that signal with clear line of sight, and correct allignment you definitely have some kind of hardware problems, with an sr5 and default settings you should get a much better signal..