An Oceanside couple is warning others about the potential drawbacks to digitally signing home repair contracts after saying a misunderstanding left them with a bill of more than $35,000 for plumbing work. Linda and Randy Stevens said the issue happened after they hired Anderson Plumbing, Heating, and Air to replace the HVAC system in their manufactured home, a project that cost about $25,000. All went as planned with this project, but while the …