It’s not your imagination. Returning online orders is getting harder.  Americans accustomed to free and easy returns are now smarting from surprise fees, shorter return windows, delayed refunds and more questions about their reasons for sending products back. A few are getting warnings that they won’t get a refund on their next return. April Bradley recently bristled at having to pay $7.95 to return a pair of Lane Bryant jeans she had purchased online that didn’t fit. The Warren County, N.J., resident said she would have preferred to try them on before purchasing, but a nearby Lane Bryant store had…