If you manually disconnect the 25' HDMI cable from the TV input and plug it into the output of your 2x1 switch, and at the other end from the PC and plug it into the 3D monitor then you will be able to use the cable as you wish.
Because you are changing the signal direction you won't be able to use switches: HDMI switches are directional. You'll have to manually switch the cable at both ends.
No. You'll be trying to connect "input 1" to "input 2" in the reverse path case - those ports won't ever be connected together. I can't think of any product that will help here.
Rock Creek Theater -- CIH, Panamorph, Martin Logan, SVS PB2000, Carada Masquerade, Grafik Eye, Bar table, Green Glue, JVC RS50 NOTE: If you find dead photo links in any of my posts, please PM me and I will fix it.